Tbh starting the history doesn't at 1948 doesn't really help much. Around 1948 is when the Jewish and Palestinian narratives are already in full swing and have some of the strongest evidence for each side. On the Jewish side you'd have their invasion by the broader Arab world and their subsequent mentality that they have to defend themselves at all costs. On the Palestinian side you have the Nakba and the resulting trauma that forms their identity.

If you go back earlier you start to see the roots of the conflict more clearly. From Russian Jews being expelled out of Russia and looking towards the Ottoman empire and historic Judea as a place from their home, Ottoman policies around 1900s when they are hyper paranoid about quashing nationalism in their multi-ethnic empire and how that plays into their treatment of Jews they allow to immigrate into their lands, then the British control over Ottoman lands and how they tried to administer to it and designated Judea as a vague "Jewish National Home" which gave neither Jews nor Arabs clarity on the political reality of the region. Then there was the early immigration of Jews to Israel in the 1910s and 1920s which meets some Arab resistance and sparks violence, but the migration stops in the mid 1920s, so tensions cool a bit. Then in the 1930s the Nazis rise to power and immigration of Jews to Palestine _really_ starts. At this point the US has imposed strict quotas on Jews immigrating to the US (in around 1924), so for many Jews Palestine isn't their first choice, but it is a choice for them and the British seem serious about this "Jewish National Home" thing, so they go for it. Then comes the great Arab revolt in 1936 where Arabs in Palestine respond to the large influx of Jewish migrants, demand independence from Britain, and seek to end the Jewish National Home project. Somewhere around the early 1940s WW2 is in swing and the Nazis invade Egypt and establish a SS unit there whose purpose is the genocide the Jews in Palestine. This was a pretty close call, if it wasn't for a British victory in Egypt that held the Nazi's back, odds are the Middle East would look very different today.

And that brings us to 1948 when the British withdraw and the stage is set for the resulting chaos. So there you have it. On one side a population struggling to determine their national identity after the fall of a 600 year old empire and dealing with a large influx of immigrants that they don't want to their lands (and also still struggling to figure out what "their" means). On the other hand you have a group of people trying to flee their home country and having no option but this weird "Jewish National Home" that totally isn't a state according to the British despite it being maybe possible a state for Jews? Then in the middle of a clearly bad situation, Britain withdraws and the Jews and Palestinians have been dealing with the situation sense.

None of this is to say that one side is right or wrong. Rather, if you look around 1948 you're already missing a lot of the buildup to the conflict and the reason there is no trust between the two groups in 1948.